Welding AISI 4130 weldneck flange to ANSI line pipe
Welding AISI 4130 weldneck flange to ANSI line pipe
(OP)
Hi all,
It is always recommended that when tieing line pipe to the wellhead by welding the last wellhead 4130 flange weldneck to A106 grade B pipe, that the weld has to be pre-heated and post weld heat treated, preferably in the shop.
Is it possible to do this welding in the field without the heat treating and be fine or is should that recommendation be considered a requirement?
Of course this bothers on the chemistry and mech. properties of the 4130 being an unassigned material, not the 106B which is a P1 material.
Thanks you.
It is always recommended that when tieing line pipe to the wellhead by welding the last wellhead 4130 flange weldneck to A106 grade B pipe, that the weld has to be pre-heated and post weld heat treated, preferably in the shop.
Is it possible to do this welding in the field without the heat treating and be fine or is should that recommendation be considered a requirement?
Of course this bothers on the chemistry and mech. properties of the 4130 being an unassigned material, not the 106B which is a P1 material.
Thanks you.





RE: Welding AISI 4130 weldneck flange to ANSI line pipe
What is the thickness of the 4130 weldneck flange? You should at least require a local preheat of 300 deg F minimum for the 4130.
RE: Welding AISI 4130 weldneck flange to ANSI line pipe
RE: Welding AISI 4130 weldneck flange to ANSI line pipe
RE: Welding AISI 4130 weldneck flange to ANSI line pipe
RE: Welding AISI 4130 weldneck flange to ANSI line pipe
RE: Welding AISI 4130 weldneck flange to ANSI line pipe
RE: Welding AISI 4130 weldneck flange to ANSI line pipe
RE: Welding AISI 4130 weldneck flange to ANSI line pipe
You need talk with qualified mechanical contractors that can provide welding/PWHT in the field. Portable equipment today is easily mobilized, and ready for use in the field. I would not reach a final decision used until I at least talked with several contractors that know your situation.
RE: Welding AISI 4130 weldneck flange to ANSI line pipe